The world has changed and so has Lakewood. It’s pointless to wonder what he would or would not have thought considering had he survived all this time he would have had different things to say.
Would he be upset at all the small communal eruvin around Lakewood? What about the restaurants? When Rav Aharon was Rosh Yeshiva, only a minority of the talmidim stayed in learning/klei koidesh for their whole lives. Would he be upset that it’s now flipped, the norm is to stay in Kollel for ten years and only a minority get jobs that don’t require them to be called “Rebbi”?